Definitions

1. adjective

resistant to or unbreakable by kissing; able to withstand being kissed repeatedly without damage or deterioration.

“The new lipstick was kissproof and stayed on for hours after the first application.”

2. noun

a material or surface that is resistant to or unbreakable by kissing; something that can withstand being kissed repeatedly without damage or deterioration.

“The cosmetics company developed a kissproof formula for their lipsticks.”