mumbo jumbo is gibberish
example: I don't understand you. Don't talk gibberish.
Gibberish means nonsense, or no formal meaning.
down low =
anything you wish to keep a secret
example:
Let's keep it down low. We don't want anyone to know about what really happened.
sketchy
someone or something that
is suspicious
example:
That guy, walking beside sarah looks sketchy.
to crush - to fall asleep.
example:
I'm so tired, I want to crush right away.
9 to 5
day job ,most corporate schedules begin at 9 am and end at 5pm
example:
I'm on a 9 to 5.
to vent - to complain about something in order to release stress
example:
Are you okay? vent it out. Stay relax and calmed. Everything will be okay.
24/7 - 24 hours a day
7 days a week
example: I work 24/7.
to hang out - to relax
with your friends
example:
I just want to hang out
with my friends during the
weekends.
The video is confusing. Avoid watching those type of videos it would just confuse you. Instead, start watching american news channels, as they are mostly neutral in accent and that they pronounce words well and most anchors have a well modulated voice which is good for learners. ^^ God bless.