what does mean "i will blast you" and "im gonna to rip you off"?
i am not sure "i will blast you " means "i will hit u or i will yell at u" and is that "rip u " means i will kill u or i will thwart or thrash u ?

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Answer

I will blast you...... in this context it could mean.... I will hurt you, kill you...

I will hit you... is to cause harm to someone, strike someone with your fists or a weapon...

I will yell at u.... where "u" is written slang for "you" and this phrase means to speak loudly at someone.

I will rip you off... this means you will steal from someone, take from someone

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is it bad to follow that pattern?

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By the way, never write 'u' or 'ur'. That's only done by small children and teenagers.

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