notadictionary.com
Quand tu tapes la discut' en attendant que ta femme finisse son créneau..
→ “When you make small talk while waiting for your wife to finish her shift..”
Quand — when — introducing a time clause; conj.
tu — you → the person doing the talking
tapes — make / do → here, 'taper la discut' is an informal expression meaning to chat or make small talk; present tense, 2nd-person singular of taper
la discut' — the chat / the small talk → colloquial contraction of 'discussion', used informally to mean casual conversation
en — while / by → connects the action of chatting to the waiting that follows
attendant — waiting → present participle of attendre, describing what 'tu' is doing simultaneously
que — that → introduces the subordinate clause explaining what is being waited for
ta — your → possessive adjective agreeing with 'femme'
femme — wife → the person whose shift is ending
finisse — finishes → subjunctive mood required after 'en attendant que' to express anticipation; present tense, 3rd-person singular of finir
son — her → possessive adjective referring back to 'femme'
créneau — shift / slot → refers to a work period or scheduled time block