Laughing uncontrollably; in fits of laughter.
in stitches
Laughing vigorously; very amused; aching due to convulsive laughter.
in the wake of
Following.
in the red
Having net losses; in debt.
in the buff
Nude.
in the nick of time
At the last possible moment; at the last minute.
in Dutch
In trouble or in disfavor.