scurril or scurrile /skurˈil/

1. Like or worthy of a vulgar buffoon
2. Indecently opprobrious or jocular

• below one's breath
• below par
• below stairs
• belowstairs
• below the line
• below-the-line
• below the salt
• bel paese
• bels
• bel sangue
• belshazzar
• belshazzars
• belt
• belt-and-braces
• Beltane
• belt bag
• belt bags
• belt drive
• belt drives
• belted
• belter
• belters
• belting
• beltings
• beltman