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Electrical term, Class A/B Amplifier.

A class A/B amplifier is also called a psh/pull amp. Class A/B amplifiers have 2 amps, one to push the speaker out (+), the other to pull it in (-). In guitar amps that use tubes, this means that one tube, a driver tube inverts the signal polarity before it reaches the B side.

A class A amp pushes and pulls the speaker, and thus must do more work. Most commercial (in home) amps (stereo receivers, etc.) are class A amps. Class A/B is generally used in guitar amps over 30 watts, high powered Bass amps, and professional power amps. Class A/B generally delivers the same power at double the impedance. So if an amp gets 100w per side @ 4 ohms, then it will generally get 200w bridged mono @ 8 ohms. This is rarely 100% true in practice.

Class A/B is also called "Bridging" an amp (transistor amps generally).
"Fender Twins use 4 6L6s in a Class A/B circut to deliver 85 w RMS @ 4 ohms... In other words, they's pretty damn clean boss."
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M.O.A.B Class Bloons

A higher class of bloons. They take multiple hits to pop, and here is the list of them: The M.O.A.B, the B.F.B, the Z.O.M.G, the D.D.T, and the B.A.D.
Person 1: I'm in the late game for the first time, and that's a ton of M.O.A.B Class bloons!
Person 2: Yeah, there is a ton of them. They rarely spawn normal bloons in the late game.

Class A Badass 

A person who is not just a badass, but a class A badass. There are levels of bad assery, a through c, with a being the biggest badass and c barely being a badass.
James Bond is a Class A Badass, while Danny Bonaduce is only a Class C Badass.
Class A Badass by LHASS October 1, 2010

class a bitch 

The biggest bitch of the century. The highest rating of bitch
she’s a class A bitch
class a bitch by Skittles_slayer August 9, 2021

Son of a Bitch Second Class

Nickname given to the Curtiss SB2C Helldiver, an American Carrier-based Dive Bomber of World War II. Earned its nickname form frustrated pilots who found its handling characteristics very undesireable. Despite the fact that the Helldiver was better armed and armored, most U.S Navy dive bomber pilots prefered the Helldiver's predecessor, the Dauntless.

ana and a boy in her class 

ana is extremely cute and everyone likes her. all the boys in her class dream of kissing her but no one gets to do this because she is too smart for them
-what? he likes her?
-of course, they are an ana and a boy in her class

bart farts his class to a punishment 

Fart makes a rude bart so he is told offf!

bart farts his class to a punishment
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