act natural 

The spur of the moment reaction during a serious or unexpected event. To adapt to the new vibe or tone of your environment. Often used during an awkward moment, a fail, mistake or error. The icebreaker for uncomfortable silence.

Examples:
Someone drops something valuable and it shatters to the floor... Act Natural!
Get pulled over... Act Natural!
Someone says something stupid making an awkward moment of some sort.... Act Natural!
Issues with your signifigant other... Act Natural!

act natural by Mark "Pockets" Sandora May 11, 2010

act a fool

To stop acting rationally and start acting foolishly; to go nuts.

Aw,ya just came home from doin' a bib!
Tell me whatcha gonna do?
ACT A FOOL!
("Act a Fool" by Ludacris)

act a fool by David E. K. December 28, 2005

Act 3 

That stand that Koici has that makes things very heavy by saying “ 3 freeze “

Koichi : Act 3 , Protect us!

Act 3 : 3 Freeze!

*some serial killers hand slams through the ground*

Act 3 by IrisSonius September 26, 2018

Act your age, not your shoe size 

Stop behaving immaturely. Said to adults who are acting like overgrown children and to school-age children who are acting like overgrown toddlers.

It's time for you to get serious and stop being silly. Grow up, pal! Act your age, not your shoe size!

Act your age, not your shoe size by meow2u3 February 23, 2008

Act Smart 

An obnoxious little kid that thinks he is smart but actually gets all his knowledge from wikipedia.

Shut up act smart!

Act Smart by DennethPenneth November 1, 2018

act like a dick 

to act like a self centered narcissist whose only concern is himself and what he/she wants.Everyone else doesn't count.

Dan takes the last piece of birthday cake from his son's birthday even though the kid has been saving it and Dan's had a piece,so he will"act like a dick" and eat it in front of the kid.

act like a dick by wordwitt December 31, 2011

act a fool

Act a fool: go crazy on someone/something

Yo car just stopped on an empty tank, tell me what yo gonn do? act a fool

act a fool by Fire[P]hoenix November 22, 2006