1
general::
Phrase(s): tuck something up (under something)
to place or push something, such as cloth, up under something. • Tuck the sheet up under the mattress when you make the bed. • Tuck up the sheet under the mattress when you make the bed., Phrase(s): tuck something up
to raise up some part of one’s clothing and attach it temporarily. • She tucked her skirt up and waded through the flooded basement. • She tucked up her skirt.
McGrawhill's American Idioms And Phrasal Verbs