Slack
To be more flexible
Cold
Got nervous about something and changed your mind about a decision
Slippery
A dangerous habit
Sticky
Very problematic moment
Delicate
Diplomatic, with tact
Scratched
Have a superficial understanding of sth
Wet
To be inexperienced
Warped
Offbeat and unconventional, it can be a little offensive to some people
Tight
Frugal with cash
Rugged
Strongly and attractively formed
Crunch
A difficult and decisive moment
Rough
Someone that can look attractive but is specially uncultured or violent
Flaky
A little defective
Bumpy
Difficult times
Soft
Too trusting or too easily convinced