to brexit or (Noun-form: brexiting)
A verb meaning to say "Goodbye" but without actually leaving. Often used in online conversations when someone says "good night" or "bye" but stays online and replies to messages.

when you tell all your mates you're gunna break up with her asap and you never do.

Also known as “Boris Math.” When hardcore math educators, most of whom are white supremacists or racists, object to using wallet-friendly, better-quality foreign math textbooks under the guise of protecting local authors and publishers, or are opposed to recruiting foreign math teachers and lecturers to teach in local schools and universities, because their presence unprovenly threatens the livelihoods of locals, who would find it hard to compete with cheaper foreign talents.

Proper Brexit lad, alpha male, winners mentality

Someone who thinks Brexit is the best thing to happen to Britain since Cornwall.

When math teachers in a school or state can’t see eye to eye on the degree of accuracy the number π should be given in a math question—for example, should the students be asked to take π to be 22/7 or 3.14?

to leave someone or something behind no matter what the consequences will be