1. Sign for "laugh" and then add a visual representation of loudness:
* Sign "laugh" (making a "ha ha" sound with your mouth)
* Then, open your hands wide and move them away from your face as if pushing sound outward, making a "whoosh" sound with your mouth.
2. Sign for "laugh" and then add a descriptive sign:
* Sign "laugh"
* Then, sign "loud" (with an open hand, palm facing outward, and moving your hand back and forth in a vigorous motion)
3. Use a combination of signs to express the meaning:
* You could sign "funny" and then "laugh" to indicate something was so funny it made you laugh out loud.
* You could sign "hard" and then "laugh" to convey that you were laughing uncontrollably.
Important Note: Sign language is very visual and nuanced. The best way to learn how to sign "laugh out loud" is to observe native signers and practice with them.