You call him by his name. English doesn't have a simple word for "son of my mother's boyfriend". There really hasn't been a need for there to be one.
If your mother and her boyfriend get married, then he'll be your step-brother.
Well besides the gender thing, some girls also refer to their close group of friends who are girls as their ''girlfriends'', and some people boys as ''boyfriends'' but pretty much other than that nothing besides that boyfriend is referring to males, and girlfriends to females as i mentioned.
Cariocas
"Besides myself" means excluding oneself, or in addition to oneself. It is used to refer to actions or choices that do not involve the speaker.
When Mary was conceived in her mothers womb.
cariocas
That means "I don't have a guy". Might refer to a boyfriend.
Air dry density
In "A Modest Proposal," Jonathan Swift refers to mothers as breeders, breed mares, and cows. He uses these terms to dehumanize and objectify mothers as part of his satirical critique on British colonialism in Ireland.
i believe it refers to "cas latency"
If the term is being used in relation to machinary or electronics, "robo" will generally refer to robotics. It may also refer to robot. Currently, there are many military applications which use robotics, such as DAARPA.
male friend?
If you refer to a college degree, an MBA is a Master of Business Administration, which has no relation to science.