To relax or feel secure about something.
easy does it
Relax; do something gently, lightly or carefully; slow down; calm down…
take it easy
To relax or rest.
lighten up
To make (something) or to become less serious and more cheerful or cas…
build on sand
To put something in an unstable position by failing to give it a secur…
child's play
Something particularly easy or simple.
cake walk
Something extremely easy.