Unfashionable and socially inept or boringly studious:
nerdy
The most unpleasant or serious thing that could happen in a situation
Worst case scenario
Without any fuss or delay; immediately:
Without further ado
A broadly accurate guide or principle, based on practice rather than theory:
Rule of thumb
Continue or confine oneself to doing or using a particular thing:
Stick to
Something that a particular person finds especially annoying:
Pet peeve
Frequently; many times:
Oftentimes
To express that the next statement should be taken seriously, particularly if it follows joking or banter.
All jokes aside
