incorporate more outdated, old-man terms in my vocabulary

‘pE-”käk-ing

verb
the act of displaying ones prized assets in a proud manner, similar to how a peacock displays its tail feathers

Ex: JoelB was guilty of peacocking when that girl walked by because he stood up real straight and flexed his super-gigantic, manly muscles.

täm-ˈfül-rē

noun
playful or foolish behavior

Ex: All that late-night tomfoolery will make it hard to get up for work in the morning.