To make light of

To make light of - to act as if something is not serious, especially when it is serious.

Example - "They've both had knee injuries but the two friends make light of their weaknesses"

Image - http://image.slidesharecdn.com/tmn1ycir16w0rsabw5dw-signature-b625229eb31cf23d31d42e27b4b53648ca27dca7e68942b496dd9aaa9364ba30-poli-151108094043-lva1-app6892/95/satire-6-638.jpg?cb=1446975989