[give] {sb} a buzz

to contact or call someone, often with the intent of having a casual or brief conversation

I'll give you a buzz when I'm ready to leave the office.
Can you give me a buzz after the meeting to discuss the project?
She gave her friend a buzz to see if they wanted to grab coffee.
He gave his colleague a quick buzz to remind them about the upcoming deadline.
Whenever I'm in town, I like to give my old friend a buzz and catch up.

to make someone become so drunk that they have no control over their thoughts or actions whatsoever

The idiom "give someone a buzz" does not have a specific and well-documented origin. Instead, it is a relatively informal and slang expression that likely evolved from the idea of consuming alcohol to the point where one feels a "buzz" or the effects of alcohol. The term "buzz" in this sense refers to the light-headed feeling some people experience when alcohol begins to take effect. It is used colloquially to indicate the intention of providing or consuming alcohol to achieve a level of intoxication.

We're planning to give him a buzz with a few shots on his birthday.
At the party last night, they tried to give her a buzz by offering her cocktails.
He decided to give himself a buzz by having a few drinks after a stressful day.
The friends gathered to give themselves a buzz and enjoy the evening.
Some people might attempt to give themselves a buzz with alcohol, but it's essential to drink responsibly.