The currency of money in the game, MapleStory.

A pick me is a woman that is willing to do anything for male approval. She will embarrass or throw other women under the bus to achieve this goal. The unfortunate thing about a pick me is usually the men they are trying to seek approval from are of poor quality and treat women badly, leaving little real benefit for the pick me.

A form of money in maple story

In Maple Story, the currency. You can get mesos from defeating monsters, a drop fest, or from trading.

Meso is the little "cute but suspicious" guy from the anime series known as Sexy Commando Gaiden or Sexy Commando, Sugoyiio Masaru-san!.
(See Sexy Commando Gaiden: Sugoiyo)

Short-form for mesocyclone. The Mesocyclone is the part of the thunderstorm that rotates and can produce a tornado. A meso can often be detected on radar or by seeing the wall cloud if you are storm chasing.

Meso is a prefix that means in the middle or intermediate, it is in between Micro and Macro