The first word 쭉 is a kind of mimetic word, that is to say, mimicry of drawing something in a straingt line, so in this lyric, this word shows the drinking up, so its meaning is the same as Up, and next word 들이켜 is a verb, and an imperative sentence. Its basic form is 들이키다, which means to drink, and this 키다 is changed into 켜 in order to make an imperative sentence. So, 쭉 들이켜 is the same as Drink it up. And the next word 술잔 is Drinking glass, 술 means alcohol, and 잔 means a glass, and 팔짱 is arm in arm, and 한 is One, and 입 is Bite, so 한 입 is One bite, and 티르소스 is the word written the way it sounds, which is the staff carried by Dionysus, the wine god, and 포도 is Grapes. By the way, did you guys see the staff RM is carrying? there are grapes vines surrounding the staff, so the last word of this lyric is grapes, right? So, 쭉 들이켜 술잔(sippin’), 팔짱(tippin’), 한 입 티르소스(grippin’), 포도(eatin’) is the same as Drink it up Drinking glass(sippin’), Arm in arm(tippin’), One bite Thyrsus(grippin’), Grapes(eatin’)
And 쭉 들이켜, we learned this, right? the next word after 쭉 들이켜 is 분위기, which means Mood, and 여기 is Here. So, 쭉 들이켜 분위기(keep it), D style(rip it), 한 입 여기(kill it), let’s steal it. is the same as Drink it up Mood(keep it), D style(rip it), One bite here(kill it), let’s steal it.