LBW or lbw may refer to:

• Laser beam welding, a type of high-precision energy beam welding
• Leg before wicket, one of the ways in which a batsman can be dismissed in the sport of cricket
• Lil' Bow Wow (now known as Bow Wow, born 1987), former name of the American rapper, actor, and music producer
• LBW Entertainment, a record label owned by rapper Bow Wow (formerly Lil' Bow Wow)
• Linux Bier Wanderung (a.k.a. Linux Beer Hike), a yearly week-long social event for Open Source software enthusiasts
• Little Baby Wanda, aka "Lil' Baby Wanda" aka "Chief"; American comic book character known primarily as chain-smoking obscenity-spewing mischief-maker; sidekicks "Sheriff", "Big Don", and "The Princesses"
• Lord Browne-Wilkinson, the Senior Law Lord of the United Kingdom from 1998 to 2000.
• Low birth weight, when a child weighs less than 5 pounds, 8 ounces (2,500 grams) at birth
• Lutheran Book of Worship, a hymnal of the Evangelical Lutheran Church in America

Leg before wicket, or lbw, is one of the ways in which a batsman can be dismissed in the sport of cricket. Following an appeal by the fielding side, the umpire will rule a batsman out lbw if the ball would have struck the wicket but was intercepted by any part of the batsman except his bat, or the hand in which his bat is held.