When you are doing something that is not the socially accepted norm and it often makes no reasonable sense to other people why you are behaving in such a manner.
Don is bolding whenever he smokes a cigarette because he unconsciously (or consciously) smokes it as fast as possible and ends up with a cherry the size of your thumb.

When Don arrives at a bring and braai with no food or drink, and proceeds to eat a second helping before people that brought food have even had one helping, we say to ourselves "Oh yes. Don is bolding again"
by D_TT June 22, 2010
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As an adjective, is a person who is very brave and audacious.
My friends think I am a bold person.
by Ana April 10, 2005
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To describe one who has revealed one's self to multiple enemies with a friendly greeting.
by Representative Binks May 09, 2018
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Me: I need some tips so im not alone my whole life
Reagan: be BOLD
by I like avocados November 02, 2019
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Something that is truly excellent or praiseworthy.
That is one bold shirt you are wearing Seth.
by Slartibartfast April 09, 2004
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Used specifically in Ireland by a parents or teachers to denote when a child has behaved or is behaving badly.
Some chap in my class found an empty birds egg on the beach so carried it home carefully in the car, brought it into school and put it on display. Upon noticing it on display I took the initiative to strength test it and crushed it in my hand. He was very upset upon returning to the display to see it crushed and started crying. When the teacher found out I was denounced as a “bold, bold boy,” to my entire class.

In Ireland if something is fun, it's probably bold.
by Joost911 November 19, 2012
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