Jonas Brothers | American English Subtitles

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make the most of something - to use a situation or object to be benificial (positive) instead of negative

to break a sweat- to start sweating

to freak out- to be very emotional (can be happy, sad, excited, scared etc.)

to split- in this context "split" means to leave quickly

it just don't fit- something is not right

ex- colloquial way to say "ex-girlfriend" or "ex-wife"

background check- an official check done to uncover information in someone's past

come to this- to end up this way (implies negative situation and limited options to fix the situation)