What's the term for a r.v. X “upper bounding” Y probabilistically? [duplicate]

What's the term for when a random variable $$X$$ has a higher probability of being greater than t than the probability of $$Y$$ being greater than $$t$$ for all real $$t$$? I recall reading a term for this somewhere but can't remember where, and this this turns out to be annoying to Google. I don't want to end up making up a new definition when one exists somewhere. Additionally, are there any other related notions of a random variable upper/lower bounding another? It doesn't really make sense to say $$X > Y$$ for example (unless maybe if the essential min of $$X$$ is strictly greater than the essential max of $$Y$$).