Mr guy is the guy everyone aspires to be

a Mr. Guy is someone who does almost everything he can as best as possible. This often causes him to stress over pointless things and to act super busy.

the act of trying to be cool when you look stupid doing it and/or are not cool by any means.

a really potent strain of marijuana.

The act of trying to be cool when you are not (Captain Max)

Mr. Nice Guy, Is a way to describe the certain situation -Where your dick is not HARD, nor Soft.... Meaning there's enough blood pumped in it to give it some respected amounts of girth and heftiness, and a very nice banana shape... And, there's not enough blood to make it erect and create some discomfort in public nudity places(i.e Public showers, Schools gym shower, Sauna...).
All this makes a perfect situation for walking proudly among other fellow men which do not or are not currently having this phenomenon.
Public showers are a great place to have a "Mr. Nice Guy", because you walk proudly among other shrinked and springie looking dicks...
Also a great time for it, is when you show him to a lady, So she can fully appreciate the shape and size of the tool.

A guy who always hangs out with the same girl. They may be hooking up, but no one is quite certain.