gravitationally challenged

adjective2

1. •
   (humorous, euphemistic) Fat.

   • [T]he chunky Mr. Ackerman took to the stage. First he told fat jokes. . . . "I'm not fat. I'm gravitationally challenged." — 1996
2. •
   (humorous, euphemistic) Of a person, having a poor sense of balance; subject to intervals of dizziness.

   • Consider that the person asking is Mr. Bean, the diminutive, awkward, gravitationally challenged, accident-prone incarnation served up by Rowan Atkinson. — 2003