Alternative form of ce n'est pas à un vieux singe qu'on apprend à faire des grimaces

no problem!

besides, additionally, furthermore, what's more

(informal) to behave in a haughty, insolent, impudent, cheeky, cocky manner; to have some gall, nerve, cheek, etc.

Synonym of ne pas en foutre une

(informal, derogatory) not to overstrain oneself, not to over-exert oneself, not to overdo it, not to wear oneself out, not to kill oneself over (something), to take it easy

Dated form of ne pas se fouler.

(figuratively) to make the first move

full-fledged

sticks and stones may break my bones, but words will never hurt me