jumbly tummy

jum·bly tum·my
/ˈjəmblē ˈtəmē/

stomach troubles; when your tummy is all jumbly

Jumbly tummy: a stomach ache, typically motion sickness

Example:
(In car)
P1: oooooooh I’ve got the jumbly tummies!
P2 (mother): get the gravol!
End scene