Your mouth. Especially when you're concentrating, or right before you're about to laugh.
Dein Mund, besonders, wenn du dich konzentrierst,
kurz bevor du loslachst.
I didn't put up with his crap for years... just to be squeezed out right before he kicks.
Ich lasse mich nicht rausdrängen,
kurz bevor er draufgeht.