know (something) inside out

informal

to know everything about a subject.

Why don't you ask Mike? He knows the system inside out.

• rest in peace
• rest is history
• rest on laurels
• rest on your laurels
• return the compliment
• return the favor
• revel in
• revel in something
• revert to type
• revolving door
• rich seam
• ride a wave
• ride a wave of
• ride a wave of something
• ride coattails
• ride herd on
• ride herd on someone
• ride herd on something
• ride on
• ride on a wave
• ride on something
• ride on the back of
• ride on the back of something
• ride on the wave
• ride out