「あっそ」と流すのもよし、本気にするのもよし。
Sentence Analyzer
English Translation
        You can let it slide with a "oh?" or you can take it seriously.
    
Furigana
        「あっそ」と流 すのもよし、本気 にするのもよし。
    
Romanji
        " a so" to nagasu no mo yoshi, honki ni suru no mo yoshi.
    
Words
            
                あっ
            
            
                (あっ、あ、アッ)
            
        
        
            Ah! (expression of surprise, recollection, etc.); Oh!; Hey! (to get someone's attention)
        
    
            
                祖
            
            
                (そ)
            
        
        
            ancestor; forefather; progenitor
        
    
            
                と
            
            
                (と)
            
        
        
            if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)
        
    
            
                流す
            
            
                (ながす)
            
        
        
            to drain; to pour; to spill; to shed (blood, tears); to wash away; to distribute (e.g. electricity over wires, music over a PA system, etc.); to circulate; to broadcast; to beam; to cruise (e.g. taxi); to float; to set adrift; to call off (a meeting, etc.)
        
    
            
                の
            
            
                (の)
            
        
        
            indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
        
    
            
                も
            
            
                (も)
            
        
        
            too; also; in addition; as well; (not) either (in a negative sentence); both A and B; A as well as B; neither A nor B (in a negative sentence); even; as much as; as many as; as far as; as long as; no less than; no fewer than; even if; even though; although; in spite of; further; more; again; another; the other
        
    
            
                良い
            
            
                (よい)
            
        
        
            good; excellent; fine; nice; pleasant; agreeable; sufficient (can be used to turn down an offer); ready; prepared; profitable (e.g. deal, business offer, etc.); beneficial; OK
        
    
            
                本気
            
            
                (ほんき)
            
        
        
            seriousness; truth; sanctity
        
    
            
                に
            
            
                (に)
            
        
        
            at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although
        
    
            
                為る
            
            
                (する)
            
        
        
            to do; to cause to become; to make (into); to turn (into); to serve as; to act as; to work as; to wear (clothes, a facial expression, etc.); to judge as being; to view as being; to think of as; to treat as; to use as; to decide on; to choose; to be sensed (of a smell, noise, etc.); to be (in a state, condition, etc.); to be worth; to cost; to pass (of time); to elapse; verbalizing suffix (applies to nouns noted in this dictionary with the part of speech "vs"); creates a humble verb (after a noun prefixed with "o" or "go"); to be just about to; to be just starting to; to try to; to attempt to