to do something that is considered unacceptable
делать что-то, что считается неприемлемым (delat' chto-to, chto schitaetsya nepriemlemym)
"He crossed the line when he insulted her in front of everyone."
"Он перешел черту, когда оскорбил её перед всеми." (On pereshel chertu, kogda oskorbil ee pered vsemi)
very happy and cheerful
to make the difference between two things less clear or dist...
a small part of a much bigger problem
to just barely manage to do something
to become extremely popular online
to become angry or upset
