excess baggage

Short definition from Wiktionary

Noun

1. 1
   Luggage which exceeds the allowable size or weight (as for an airline flight or train trip), and for which an extra fee must therefore be paid.
2. 2
   Something or someone not needed or not wanted; something or someone of little use or importance; something or someone considered burdensome.
3. 3
   A dubious or unhelpful mental outlook, emotional disposition, or personal history.